how to make curve-surface animation

[tagosaku]

I made a model A like a donut shape. This is made with circle and rotate animation and applied a sweep to create mesh. The mesh's surface animates as arrows shows and this method works because profile shape is circle.

Next I want to make surface animation with more complex curve profiles. This case, transform SOP is not working anymore because the surface should move more sliding way, instead of just simple rotating. To achieve this, I imagine to control vertex animation or primUV VEX, but have no idea how exatcly set up. 

If you have any ideas, please let me know. Thanks in advance!!

 

 

[konstantin magnus]

Hi tagosaku,

a VEX wrangle for shifting a curve could like this:

float speed = chf('speed');

float u = vertexcurveparam(0, i@vtxnum);
vector uv = set((u + @Time * speed) % 1.0, 0.0, 0.0);
vector pos = primuv(0, 'P', i@primnum, uv);

v@P = pos;

 

shift_roll_sweep.hipnc

[tagosaku]

Konstantin ,

OMG, terrific!! Thanks a lot!!,  

Vielen Dank!!,